12212001002120 has 32 divisors (see below), whose sum is σ = 27477697095000. Its totient is φ = 4884676873728.

The previous prime is 12212001002077. The next prime is 12212001002129. The reversal of 12212001002120 is 2120010021221.

It can be written as a sum of positive squares in 4 ways, for example, as 10436556680356 + 1775444321764 = 3230566^2 + 1332458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12212001002095 and 12212001002104.

It is not an unprimeable number, because it can be changed into a prime (12212001002129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250389 + ... + 5430308.

Almost surely, 2^{12212001002120} is an apocalyptic number.

12212001002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212001002120 is an abundant number, since it is smaller than the sum of its proper divisors (15265696092880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212001002120 is a wasteful number, since it uses less digits than its factorization.

12212001002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720457 (or 7720453 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12212001002120 its reverse (2120010021221), we get a palindrome (14332011023341).

The spelling of 12212001002120 in words is "twelve trillion, two hundred twelve billion, one million, two thousand, one hundred twenty".